Build Your Own Taratxt Gateway (DIY Guide)
This guide will help you build your own SMS Gateway using an ESP32 and SIM800L GSM module. Once connected, your device can send and receive SMS via Taratxt’s platform and API.
Required Components
| Part | Description |
|---|---|
| ESP32 Development Board | WiFi-enabled microcontroller (e.g., DevKit V1) |
| SIM800L GSM Module | GSM module to send/receive SMS |
| 3.7V Li-Ion Battery (optional) | For stable GSM power supply |
| 1N4007 Diode or Buck Converter | To regulate voltage for SIM800L |
| Jumper Wires | For connecting the modules |
| Breadboard or PCB | For prototyping or permanent setup |
| SIM Card with Load | Inserted into SIM800L |
Required Software
- Arduino IDE
- Taratxt Firmware (available on GitHub)
Make sure you've installed the ESP32 board support in Arduino IDE.
(Go to File > Preferences > Additional Boards Manager URLs and add https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json)
Wiring: ESP32 to SIM800L
⚠️ The SIM800L is sensitive to voltage. Do not connect it directly to 5V from ESP32.
Suggested Wiring:
| ESP32 Pin | SIM800L Pin |
|---|---|
| 3.3V | VCC (via diode or buck converter) |
| GND | GND |
| GPIO17 | TX |
| GPIO16 | RX |
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Upload Firmware
- Open Arduino IDE
- Load the Taratxt firmware sketch
- Modify the following lines in the code:
const char *ssid = "YOUR_WIFI_SSID"; // Replace with your Wi-Fi SSID
const char *password = "YOUR_WIFI_PASSWORD"; // Replace with your Wi-Fi password
const char *serverName = "https://taratxt.com/api/"; // Replace with your server URL
const char *deviceKey = "YOUR_DEVICE_KEY"; // Replace with your device key
const char *token = "YOUR_API_TOKEN"; // Replace with your token
- Go to Tools > Board and select ESP32 Dev Module
- Connect your ESP32 to your computer via USB
- Select the correct port from Tools > Port
- Click Upload to flash the firmware onto your ESP32
Final Steps
- Once connected, your device will appear as Online in your Taratxt Dashboard.
- You can now use the platform to:
- Send SMS from your device.
- Receive SMS and forward them via webhook or API.
- Monitor activity and device health.